I\'m having what appears to be the same issue as undefined method `assertions' in routing spec but I\'m running Rails 4 and it is locked to minitest 5.0 or greater. Thus
This problem is caused by a change in minitest 5.0 documented here:
# https://github.com/seattlerb/minitest/issues/286
is fixed by using:
gem "rspec-rails", '~> 2.14.0.rc1'
in the gemfile.